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received. The 74-200 provides a switch closure to signal other
devices at the EXT. ALERT jack when the radio receives an alert.
The output is compatible with home automation devices from
suppliers like X-10 and others. Connect the positive lead of the
interface to the tip of the
1
/
8
inch (3.5mm) phone plug and the
negative lead to the body of the plug.
A DC powered device using 12 Volts or less and requiring less
than 300mA of current can be switched directly using the EXT.
ALERT jack. Observe the polarity of the jack so that the negative
side of the external power source is connected to the body of the
1
/
8
inch (3.5mm) phone plug and the device is connected to the
positive source and to the tip of the phone plug.
The internal switch is closed when an alert is received. Pressing
the OFF button on the front of the radio will open the switch. For
best control of external devices we recommend using the ALERT
only mode as opposed to the VOICE mode.
NWR Alert Descriptions
This table contains the NWR descriptions of all the types of alerts
that your 74-200 will display. The display text and type of alert
sound are shown for each type of alert
What You See Weather Alert
Description
Alert Sound
TORNADO
WATCH
Tornado watch Fast siren
TORNADO
WARNING
Tornado warning Very fast siren
SEVERE Severe thunderstorm Fast siren